Vitruvius, Vitrvvivs Itervm Et Frontinvs À Iocvndo Revisi Repvrgatiqve Qvantvm Ex Collatione Licvit, 1513

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343165DECIMVS. ti, Eſt. n. tignum, qđ erigitur & diſtinetur retinaculis
quadri fariã, ſub retinaculis chelonia duo figuntur,
troclea funibus ſupra chelonia religatur, Sub tro-
clea regula lõga arciter pedes duos, lata digitos ſex,
craſſa quatuor ſupponitur.
Trocleæ ternos ordines
orbiculorum in latitudinem habentes collocantur, ita
tres ductarii funes in ſummo machinæ religantur.
Deinde referuntur ad imam trocle am, & traiiciũtur
ex interiore parte per eius orbiculos ſummos.
Dein-
de referuntur ad ſuperiorem trocleam, &
traiiciun
tur à dexteriore ꝑte in interiorem per orbiculos imos-
Cum deſcenderint ad imum ex interiore parte, &
per
ſecundos orbiculos traducuntur in exteriorem, &
re
feruntur ad ſummum ad orbiculos ſecundos, traiecti
redeunt ad imum, ex imo referuntur ad caput, &
tra
iecti per ſummos redeũt ad machinam imam.
In ra-
dice autem machinæ collocatur tertia troclea.
Eam au-
tem græci ἐ ϖάγοντα, noſtri artemonem appellant.

Ea trocleareligatur ad machinæ radicem habens or
biculos tres, per quos traiecti funes traduntur homi
nibus ad ducendum.
Ita tres ordines hominum du-
centes ſine ergata celeriter onus ad ſummum perdu-
cunt.
Hoc genus machinæ polyſpaſton appellatur, ꝙ
multis orbiculorum circuitiõibus, &
facilitatem ſum-
mam praſtat &
celeritatem. Vna autẽ ſtatutio tigni
hanc habet utilitatem, ꝙ antequam tum uelit ad dex
tra ac ſiniſtra, ad later a declinando onus deponere
poteſt.

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